class PaginationBase:
    def get_pagination_data(self, paginator, page_obj, around_count=2, model=None):
        current_page = page_obj.number
        num_pages = paginator.num_pages

        left_has_more = False
        right_has_more = False

        if current_page <= around_count + 2:
            left_pages = range(1, current_page)
        else:
            left_has_more = True
            left_pages = range(current_page - around_count, current_page)

        if current_page >= num_pages - around_count - 1:
            right_pages = range(current_page + 1, num_pages + 1)
        else:
            right_has_more = True
            right_pages = range(current_page + 1, current_page + around_count + 1)

        # 查询总条数
        count = model.objects.all().count()

        return {
            'left_pages': left_pages,
            'right_pages': right_pages,
            'current_page': current_page,
            'left_has_more': left_has_more,
            'right_has_more': right_has_more,
            'num_pages': num_pages,
            'count': count,
        }
